Onpan Cheung, M.D., M.P.H.
NPI 1639195746ActiveIndividual· Internal Medicine, Gastroenterology· Denison, TX
Internal Medicine, Gastroenterology (M.D., M.P.H.) with Texomacare Specialty Physicians, practicing in Denison, Texas. In 2024 Medicare paid $164,768 for 436 patients, and Part D covered 632 of their prescriptions, 78% of them generic. Janssen Biotech, Inc. was the largest of 5 companies reporting payments in 2025, $278.18 in all, mostly food and beverage. Lists Alliancehealth Durant and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1639195746 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., M.P.H. |
| Sole proprietor | Yes |
| NPI issued | Jul 14, 2006 |
| Last updated in NPPES | Aug 26, 2023 |
| Certified by provider | Aug 26, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | U1248 | TX |
| Internal Medicine, Gastroenterology | 207RG0100X | FC1954189 | CA |
| Internal Medicine | 207R00000X | 0101238939 | VA |
| Internal Medicine, Gastroenterology | 207RG0100X | A111454 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA); Practitioner - Gastroenterology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 436 |
|---|---|
| Services billed | 1,711 across 37 procedure codes |
| Paid by Medicare | $164,768 |
Part D prescriptions in 2024
| Prescriptions (claims) | 632 · 872 30-day fills |
|---|---|
| Patients | 233 |
| Total drug cost | $114,933 |
| Generic share | 78% of claims |
Education and affiliations
| Graduation year | 2003 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Texomacare Specialty PhysiciansDurant, OK · 38 clinicians
Hospital affiliations
- Alliancehealth DurantDurant, OK
- Alliancehealth MadillMadill, OK
- Texoma Medical CenterDenison, TX
Industry payments (Open Payments)
- 2025$278.18 · 10 payments from 5 companies
- 2024$52.09 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $110.15 | 2 |
| Abbvie Inc. | $98.12 | 5 |
| Regeneron Healthcare Solutions, Inc. | $25.30 | 1 |
| Madrigal Pharmaceuticals | $23.98 | 1 |
| Takeda Pharmaceuticals U.S.A., Inc. | $20.63 | 1 |
What the 2025 payments were for
- Food and Beverage$194.18 · 9 payments
- Education$84.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other gastroenterologists in Denison
- 1053643072
- 1396958484
- 1447238597
- 1497195457